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[67.180.167.114]) by smtp.gmail.com with ESMTPSA id z79-v6sm26397488pfl.33.2018.11.12.07.44.19 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Nov 2018 07:44:19 -0800 (PST) Subject: Re: [PATCH 1/2] mm/page_alloc: free order-0 pages through PCP in page_frag_free() To: Alexander Duyck , =?UTF-8?Q?Pawe=c5=82_Staszewski?= Cc: aaron.lu@intel.com, linux-mm , LKML , Netdev , Andrew Morton , Jesper Dangaard Brouer , Eric Dumazet , Tariq Toukan , ilias.apalodimas@linaro.org, yoel@kviknet.dk, Mel Gorman , Saeed Mahameed , Michal Hocko , Vlastimil Babka , dave.hansen@linux.intel.com References: <20181105085820.6341-1-aaron.lu@intel.com> From: Eric Dumazet Message-ID: <6edcec1a-eefa-7861-1af4-cdf7fa45184c@gmail.com> Date: Mon, 12 Nov 2018 07:44:18 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.9.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/12/2018 07:30 AM, Alexander Duyck wrote: > It sounds to me like XDP would probably be your best bet. With that > you could probably get away with smaller ring sizes, higher interrupt > rates, and get the advantage of it batching the Tx without having to > drop packets. Add to this that with XDP (or anything lowering per packet processing costs) you can reduce number of cpus/queues, get better latencies, and bigger TX batches.